Improvement in paper-pulp engines



A1109.) I i Y zsh --sh JONATHAN HATCH. ee m' improvement in Paper PulpEngines. d

N0. 121,780. 1 Patented Dec.'1v2,1871.

A109.) zsh sh 2.

JONATHAN HATCH. t t

Improvement in 'Paper Pulp Engines.

NO. 121,780. I Patented Dec. 12, 1871.

AM Pf/ara-urHas/uF/fgc :a ,v x fassa/riffs Means) UNITED STATES PATENTOrrrcn,

JONATHAN HATCH, OF SOUTH WINDHAM, CONNECTICUT, ASSIGNOR TO SMITH,WINCHESTER 81; CO., OF SAME PLACE.

IMPROVEMENT IN PAPER-PULP ENGINES.

Specification forming part of Letters Patent No.121,780, dated December12, 1871.

To all 'whom it may concern:

Be it known that I, JONATHAN HATCH, of South Windham, of the county ofWindham and State of Connecticut, have invented certain new and usefulImprovements in Machines for Making Paper-Pulp, my invention havingreference particularly to the well-known Jordon pulp-engine asexhibitedin Letters Patent No. 317, dated February 5, A. D. 1861, andgranted to Joseph Jordon, Jr.; and l do hereby declare my said inventionto be fully described in this my specification and represented in theaccompanying drawing making part thereof, and of which- Figure l is atop view, Fig. 2 a side elevation, Fig. 3 a longitudinal section, andFig. 4L a transverse section of the pulp-engine as improved by me. Fig.5 is a top view of the male grinder. Fig. 6 is a horizontal section ofthe female grinder. Fig. 7 represents an end view of some of the bladesor knives of the male grinder, with the i dovetailed groovedsupporting-rib andthe wooden bars arranged between the knives.

This engine has the principal characteristics or members of thatdescribed in the aforesaid patent.

My improvements may be stated to consist as follows, viz.: In the malegrinder as constructed with dovetailed grooved metallic ribs to receivethe knives or blades, and with wooden bars driven between and iirmlyagainst the knives and notched upon the ribs, all-bein g substantiallyas hereinafter explained and as represented in the drawing. Next, in thefemale grinder as constructed with internal and longitudinal ribs, andas provided with knives or blades and wooden voussoirs or arch-barsarranged and held between such ribs by a key or keys, all beingessentially i as hereinafter specified and as represented in thedrawing. Next, in the female grinder as provided with one or morepockets or chambers arranged to open out of its lower part for thepurpose of intercepting any piece or pieces of iron, buttons or otherforeign matters which, finding their way into the pulp-engine, would belikely to injure its knives.

I would remark that the drawing shows each of such knives as curved orbeveled on that portion of its front end which extends above the iillingbetween the knives. This improvement, though shown, is not claimed by meas my in- Vention, it having been, as I am led to believe,

invented by Charles Smith, of said South Windham.

In the drawing, A denotes the male grinder, which in external form is aconic frustum. It is fixed on a driving-shaft, B, which extends axiallythrough it and the female grinder or she C, which receives the malegrinder in manner as represented and has its axis arranged horizontallyor thereabout. The intercepting-chamber or pocket is shown at D asarranged at the lower part of the female grinder and opening out of theinterior space thereof', such pocket being open at bottom and thereprovided with a slide or door, a, to enable a person to remove from thepocket at any time any foreign matter or matters which may haveaccumulated therein. The pocket, owing to its situation, will generallycatch or intercept such matter or matters, thereby preventing anymaterial injury to the knives being occasioned thereby. The body part bof the male grinder is a conic frustum provided with a series ofmetallic ribs, c, extending around it transversely both at its ends andat intervals between such. These ribs down to the outer surface of thebody are formed with grooves extended through them rectilinearly anddovetailed in transverse section, they being to receive the knives orblades d, which have a corresponding dovetail form and are drivenendwise into the grooves of the ribs. The intervals or spaces betweenthe knives are filled to a suitable distance from the surface of thebody of the grinder by bars e, of wood, driven firmly into such opening,and notched upon the ribs so as to rest in close contact with them andthe knives, thereby affording an elastic support for the knives, whichoperates to prevent them from being broken by sudden lateral strains.Instead of supporting the knives or blades of the female grinder incurved sections or plates of metal arranged around within and tted tothe shell or case, and fastened therein, as heretofore, I cast orconstruct the case j' with a series of ribs, g, extended longitudinallythrough it and to project from its inner surface. Between such ribs Iarrange the knives or blades h at or about equal distances apart, withwooden voussoirs or arch-bars i disposed between the blades, each seriesof blades and voussoirs being fastened in place by a wooden key, k,driven between two of the voussoirs so as to crowd firmly together theknives and voussoirs and force both svrivs vlnsvlup against thvahntmvnts or snstaining-rihs. This mntlv nl' applyingV and snpportinglthv ltnivvs admit.\l u1' thvir livin;l vasil)4 removed t'l'um thv l\hvllwhvn it may hv dvsirahlv t0 rvplavv thvm with uthvrs.

Having thu` dvsvrihvtl my invvntinn. what l Claim as snvh in thvpnlp'vnginv as mvntinnvd may hv statvd as follows, viz.:

l. The malv grindvr as vnnstrnvtvd with thv dovetailvd Lrnavvd mvtallivrhl v tu rvvvivv thv knives II, and with thv wtmtlvn har` tA drivvn hvAtween and against thv knivvy and nntvhvd npnn the rib c, all bvingsnhstantially as spvcitivtl and i 2. "he tvmale grinder as vonstrnctvdwith thv i intvrnal and longitudinal rihs g, and as provided with thvknivvn` l1 and thv wvndvn vnnssnirs 01 arvhrhar 1' arrangvd and hvldhvtwvvn and hy snvh rihs by nnv/ or more kvys, lc, all hvingsubstantially as vxplainvd and rvprvsvntvd.

I. Thv t'vmalv grindvras providvd with one 0r mmv intvrvvptingr-chambvro1' pockvts, l), arrang'vd with it, vssvntially as and for the purpnsvdvsvrihvd, and the conlhinatinn of' .such

puvltvt n1' puvkv` with the malvl and female grindvrs, arrangvd asdescribed 0r shown.

JONATHAN HATCH. \\itnvfsses:

A. S. WINCHESTER,

J. W. Tmm'rs, (108)

